Respirator



Dec. 22, 1936.. H, s, COVER 2,065,304

RESPIRATOR Filed Jan. 9, 1936 2 Sheets-Sheet 1 if' Z4 j'f Z4 XZ' g! Z gung-7 "4; 2

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D ec. 22, 1936. H. s. COVER 2,065,304'

RESPIRATOR Filed Jan. 9, 1936 2 Sheets-Sheet 2 haw/afar:

Patented Dec. l22 1936 `2,065,304

UNITED STATES PATENT OFFICE REISPIRATOB. Harvey S. Cover, South Bend, Ind. A 4 Application January 9, 1936, Serial No. 58,253

10 Claims. (C1. 128146)- This invention relates to improvements in The subject matter of my present application respirators. It has for an object the producresides essentially in an improved type of lter tion of an improved device to be used for proholder secured to the side walls I6 and I1. The tecting the user from dust, smoke, and noxious filter holders, of which there is a pair, each gases of various kinds. consists of a metallic retaining plate 22, prefer- 5 One of the objects of the invention is to pro" ably circular in outline although it will be undervide a simple, practical, and eilicient respirator stood that the precise shape is not essential of the character described. tomy invention as the same may be either Another object is to, provide a light Weight square, oval, or otherwise, as desired. Asso- 10 respirator adaptedto permit good vision. ciated with the retaining plate 22 is a filtering 1n Another object is to provide a respirator of the pad element 23 of similar outline to the plate 22 character described having a large area for flland of the same or slightly larger area. Plate tering and also adapted for easy breathing, 22 has a circumferential curved vedge portion 24 A further object is to provide a device of the providing a cavity 24a and hasan inwardly decharacter described which is comfortable and flected flanged edge portion 25. Plate 2,2 is furl5 possesses high efficiency vfor catching dust, dirt, ther-provided with a central extrusion or hump smoke, and the like. a 26 and a plurality of similar extruded portions A still further object is to provide a respira- 2'I locatedvaround the central extrusion 26. tor having a readily removable filtering pad Fig. 4 clearly discloses a flanged tubular lock- Qorequiring no adjusting or locking parts. ing member 28, the tubular portion of which is An additional object is to provide a respirator adapted to be passed through aperture I8, and wherein substantially the entire area 'of the flla flanged collar 29 is provided, having a numter pad is available for filtering purposes. ber of lateral openings 3,0 and a sloping llpWald Other objects and advantagesA will become apedge portion 3l, the locking member 28 and the parent and be brought out more fully in the collar 29 being adapted to form a anged joint Q following specification, reference Abeing had to 32 (Fig. 15 by which the plate 22 is secured toy Cal the accompanying drawings, wherein: the side walls I6 and I1 of the body portion Fig. 1 is a plan section of a preferred embodi- I0 of the respirator. lt will be observed that ment of my invention,.taken on the line I-I of nut 2U of the head strap I9 will lie in the Fig. 2; cavity formed by the central extrusion 26, thus 30 Fig. 2 is a central sectional elevation taken permitting the filter plate 22 to lie substantially along the line 2-2 of Fig. 1; flat against the face of the wearer. The iilter Fig. 3 is a perspective view of the invention pad 23 is secured in place by the iianged edge illustrating the mode of attachment of the filter 25 of plate 22, the pad'being normally somewhat 35 pad to the device; and thicker than the space provided between the 35 Fig. 4 is an exploded view in section of one edge 25 and the base portion of the plate 22, of the filtering elements. such that the pad 23 must be compressed some- Referring more particularly to the drawings what at the edges in order to make a secure fit, and especially to Fig. 2, I show a respirator havthis fit being further assisted by the sloping ing a body portion III provided with cut-outs II upper edge of the collar 29, and when the pad 40` at the top and bottom to accommodate the nose 23 is placed in position the edge portion nearest of a wearer, the body portion I0 being reversithe collar 22 is first slippedunder the flange ble. I also show a bulbous valve housing I2 25 as shown in Fig. 3, whereupon the rest of having a pair of exhaust openings I3, the housthe edge of the pad may be slipped under the ing I2 inclosing a valve seat I4 whichcoopercircular flange 25. The pad will thus be seen 45 at'es with an exhaust valve I5, the body I0 havto cover the bottom of plate 22 completely, aling also a rearwardly extending right wall I6 though separated from the plate by the exand a left wall I'I, each provided with a circutrusions 26 and 2l and the top edge of the collar lar aperture I8. A head strap I9 is provided 29, and since the pad 23 is formed to be slightly 0 and is secured to walls I6 and I1 respectively larger in area when flat than that of the plate 50( by a nut 20 and bolt 2I. The foregoing features 22, it will be obvious that a tight and secure are similar in all'respects to the type of respiracircumferential t is made With the pad and tor covered by United States patent application the edge 24 of the plate 22. It will be further copending herewith, Serial No. 56,255, filed obvious that substantially the entire inner sur- December 26, 1935. face of the pad 23 is available for the transfv CFI mission of air ,fsince this surface is separated from the surface of the plate 22 by the extrusions 26 and 21 and the collar 29, resulting in a number' of passageways between the interior surfa/ce of the pad 23 and the openings 30 thro gh which the air may pass into a tubula passage provided by member 28 vto the inte 6r of the body I0 of the respirator. The fl ged portion 25 insures a tight fit with the e portion of the pad 23, preventing any leakage of air and dust around the edge of the pad 23.

It will thus be apparent that the invention as described achieves all of the objects hereinbefore stated for the device.

While I have illustrated and described the preferred form of construction for carrying my invention into eiect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having iilter means comprising a corrugated plate, an aperture in said plate registering with said intake port, and a filter pad secured to said plate over said aperture.

2. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having lter means comprising a plate, an aperture in said plate registering with said intake port, and a filter pad secured to said plate over said aperture, said plate having a plurality of raised portions adapted to provide a space between said pad and plate.

`3. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having filter means comprising a plate, an aperture in said plate registering with said intake port, the periphery of said plate being formed with an inwardly opening groove and a lter pad over said aperture and secured to said plate with the edge portions tucked into said groove.

4. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having lter means comprising a plate, an aperture in said plate registering with said intake port, the periphery of said plate being formed with an inwardly opening groove and a filter pad over said aperture and having its edges tucked into said groove to removably secure the same to said plate at the edge portions thereof.

5. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having filter means comprising a plate, an aperture in said plate registering with said intake port, and a lter pad over said aperture, said plate having its periphery curved inwardly to form means to secure said filter pad thereto.

6. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having iilter means comprising a plate, an Vaperture in said plate registering with said intake port, and a lter pad over said aperture, said plate having its periphery curved inwardly to form a peripheral pocket to receive the edge of said filter pad, and the edge of said inturned portion being adapted to clamp the lter pad, substantially as described.

'7. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having lter means comprising a plate, an aperture in said plate registering with said intake port, a filter pad over said aperture, and means to secure said lter pad in substantial spaced relation to said plate, said means comprising a plurality of extrusions on said plate.

8. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having filter means comprising a plate, an aperture in said plate registering With said intake port, a filter pad over said aperture, and means to secure said lter pad in substantial spaced relation to said plate, said means comprising a plurality of extrusions on said plate and a tubular member extending through said aperture.

9. In a respirator, a body portion having an exhaust valve and an intake port, said intake port having lter means comprising a plate, an aperture in said plate registering with said intake port, a filter pad over said aperture, and means to secure said lter pad in substantial spaced relation to said plate, said means comprising a plurality of extrusions on said plate and a tubular member extending through said aperture, said tubular member having a lateral aperture adapted for passage of air from the inner side of said lter pad into said body portion.

l0. In a respirator, a body portion having an intake port, said intake port having filter means comprising a corrugated plate, an aperture in said plate registering with said intake port, and

a lter pad secured to said plate over said aperture.

HARVEY S. COVER. 

